Pump.



UN TE F T E E @FHQE.

HARRY MEAD, OF OAKLAND, CALIFORNIA.

PUMP.

Spccification of Letters Patent.

PatentedApr. 9, 1918,

Application filed January 12 1916. Serial 1\T 0. 71,678.

' pumpedoutof comparativelydeep wells and generally contains a greater or less quantity of sand and natural gas.

The comparatively slow velocity of a rising column. of oil in a well when acted onby a pumppermits the sand to settle to the bottom where it gradually'clogs up the pump. Similarly any. pressure'of natural gas causes trouble as it often collects in the pipe between the pump and the surface in the form. of big bubbles which compress or expand, as the plunger reciprocates, thus rendering the pump inoperable until the gas has been removed.

The object of the present invention is to overcome these troubles by producing a perfect emulsion of oil, sand and gas and furthermore to provide means for maintaining said: emulsion as the oil column rises'to the surface. Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to theaccompanying drawings, in which- Figure 1' is a sectional view of the well casing, showing the application of the in vention'.

Fig. 2 is anenl-argedvertical, longitudinal section through one of the pump rod pistons.

Fig. Fig. 2.

Referring to the drawings in detail, A indicates a well casing; 2 a pump barrel of standard orsuitable construction; 3 the plungeroperable therein; 4 the pump rod and 5 the discharge pipe through which the oilis elevated by the plunger, and'6 a check or tact: valve connected to or secured upon 3 is a cross section on line 3-3,

the lower end of the barrel. The pump rod with connected plunger 3 may be operated 1n the'usual or any suitable manner, any mechanism for this purpose is, therefore. not shown. Secured upon the rod area plural.- 1ty of interspaced, superposed piston in'eirfl'- bers 7. These'members'are'secured bythe couplings 8 and Qsecured on"the rod and each piston 1s provided with a plurality of ports 10 throughwhichthe oiljpassjes on the downward" stroke ofthe rod and through provision ofa plate check valve 11, the movement of which is limited by collar formed "upon the"cou'pling"S." Each piston which it is'prevented from returning by the check valve' and connected couplings" constructed in a's'imilar manner andanysuitable number of samem'ay' be providedfas shown in Fig. 1.,

In actual practicea space from sixty to eighty feet has been found most practical.

' The discharge'p'ipe is constructed of ordinary casing, and for the purpose of'preventing ,anyTfr'ictio'n between the piston 7 and the rough interior of the'casing 55 a loose fit has been'provided; this is, however, not suliicient to permit any perceptible r'eturn or leakage'of oil. r

The'sole object of the present invention is to provide means for maintaining the oil while rising through the discharge pipe so agitated that an emulsion of sand and gas from which the oil is generally more or less mixed is formed. Any settling of the sand toward the bottom or formation of gas bub bles, as previously'described is thereby eliminated. This result is accomplished in the present instance by the provision'of the foot valve 6 and the plurality of superposed pis ton members/7. 1

By referring to Figs, 1 and 2,- it will be seen that an upward stroke of the pump rod with connected plunger'will cause the oil from the well to enter through the foot valve 6 through the barrel to the pump. The downward movement of the plunger will cause the oil to pass through the'upper valve in 1 the plunger 'in't'o' the discharge pipe or casing '5, -wl1ere it"graduallyas cends the velocity generally depending upon the] depth ofthe welll I The "velocity" er the rising 011 deep wells is so' slow.

that the sand has sufiicient time to settle down against the pump, where considerable damage, such as clogging of the pump,

the cutting away of the wearing surface, etc., is accomplished, which is, however, prevented in the present instance as emulsion of the oil and sand is formed when the oil passes through the several pistons and check valves shown.

The ports 10 formed in the several pistons are so small that the velocity of the oil in passing therethrough is increased to such anextent as to form the emulsion desired. The emulsion thus formed, carrles the sand and gas in an upward direction butwould soon permit it to precipitate unless it is sufficiently v agitated at suitable intervals or time limits.

I This is provided for in the present instance supported by the different pistons 7, but

that choking up of the pump by sand is similarly prevented, as an emulsion is constantly being produced as the oil passes through the ports in the pistons. In other words, the oil is agitated sutficiently often while rising through the pipe to form an emulsion, thereby preventing a precipitation of sand or formation of gas bubbles.

lVhile the specific form of piston and. check valve has here been shown, the purpose of which is to partly support the column and agitate the oil, I wish it understood that any other form of mechanism capable of producing the results desired may be employed, and that I do not wish to limit myself to the specific structure here shown. I

The materials and finish of the several parts of the device are otherwise such as the judgment and experience of the manufacturer may dictate.

. Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In combination with a pump barrel and discharge pipe of an oil well, and a plunger and pump rod reciprocating in said barrel and discharge pipe respectively, a series of circular piston members secured at suit able intervals upon the pump rod throughout the greater portion of its length..of a diameter but slightly smaller than the discharge pipe and having ports extending therethrough, andupwardly opening check valves for closing said ports uponthe upward movement of the pump IO( f 2. In combination with a pump barrel and discharge pipe of an oil well, and a plunger and pump rod reciprocating in said barnaeaove rel and discharge pipe respectively, a series of circular piston members secured at suitable intervals upon the pump rod throughout the greater part of its length of a diameter but slightly smaller than the discharge pipe and having ports extending therethrough, and upwardly opening valves, having substantially fiat upper surfaces, for closing said ports upon the upward. movement of the pump rod.

8. The combination with a well tubing of sucker rods reciprocally mounted within the tubing, of members through which liquid passes carried by the sucker rods, said members being of greater diameter than the sucker rods and of slightly less diameter than the inside diameter of the tubing and valve means for controlling the passage of liquid through saidmember;

4. The combination with a well tubing of sucker rods movable longitudinally'in the tubing, of a hollow member mounted 'upon the sticker rods and being spaced from the inside walls of the tubing, and a check valve to control the passage of liquid through said member. I

5. A device of. the character described, comprising a substantially cylindrical body having in one end a threaded socket for engagement by the sucker rod of a pump and having at the other end a central longitudinally extending stem, saidjstem c0mprising portions of unequal diameter and the portion of greatest diameter being adjacent to the body, a washer valve seated on the 100 said portion and movable longitudinally thereon, a seat on the portion of less diam:- eter and fitting against the shoulder formed between the two portions, saidseat having an annular series of transverse openings cov 105 ered by the valve when the valve is in contact with the seat, that portion of the stem beyond the seat being threaded, and a sleeve having its'ends internally-threaded for'engaging the threaded portion of the stem and. 110 for engagement by the sucker rod.

6. A device of the character described, comprising av body having in one end a socket and having at the other a longitudinally extending central jstem, a seat on the 115 stem and provided with a series of trans verse openings, a valve seated on'the stem and movable toward and from the seatrfor closing the openings, said seat being fixed and the body having means for limiting the movement of the valve away from the 'seat,. and'means engaging the body t hB PPO- site side from the seat for holding the seat in 1place, and for engagement by the sucker roc 7. A device of the character described, comprising a support, a seat of disk shape 'mounted on the support and having transverse openings, a washer valveon thesup- Pe se t t9 fi er-list.am im e. ee

ward and. from the disk for closing the In testimony whereof I have hereunto set openings, and means on the support for limmy hand in the presence of two subscribing iting the movement of the valve away from Witnesses. the seat, said support having means at its HARRY MEAD.

*'= ends for engagement by the sucker rod to Witnesses:

permit the support to be inserted. in the J. M. OUGH, length of the rod. J. J. KNIGHT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

